Analytical Sciences
Online ISSN : 1348-2246
Print ISSN : 0910-6340
ISSN-L : 0910-6340
Original Papers
Spectrophotometric Determination of Trace Amount of Copper(II) Ion Based on Complexation with an Anthraquinone Derivative
Massoud NEJATI-YAZDINEJAD
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2006 Volume 22 Issue 4 Pages 617-619

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Abstract

The spectrophotometric determination of Cu(II) with an anthraquinone derivative (Alizarin Red S) has been investigated. The experimental conditions, such as the pH of the sample and concentration of ligand, were optimized. This method is simple and sensitive for determination of Cu(II) ion. The interfering effects of diverse ions were investigated. Copper ion was determined by measuring the absorbance of the Cu(II)-ARS complex at 510 nm. Beer's law was obeyed over the concentration range of 0.011 - 0.320 mmol dm-3 and the detection limit (S/N = 3) was 0.038 µg cm-3. The relative standard deviation at 20 µg cm-3 was 1.02% (n = 5). The method was applied for real samples.

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© 2006 by The Japan Society for Analytical Chemistry
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